BGP Routing Policy Implementation JN0-650 Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   You have a BGP import policy that uses a prefix list to match routes. The prefix list contains the following entries: 192.0.2.0/24, 198.51.100.0/24, and 203.0.113.0/24. You want to accept only routes that match these exact prefixes, but the policy also matches longer prefixes (e.g., 192.0.2.0/25). What is the correct way to ensure only the exact prefixes are matched?

   • AAdd a 'then reject' action to the policy.
   • BUse a regular expression to match the prefix.
   • CUse the 'exact' option in the prefix list.
   • DUse the 'longer' option in the prefix list.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What is the purpose of AS path prepend in a BGP policy?

   • ATo remove AS numbers from the AS path to make the route more preferred
   • BTo set the next hop of the route
   • CTo add a new AS to the AS path to make the route less preferred
   • DTo change the origin of the route
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which BGP attribute can be modified in a policy action to influence route selection within an AS?

   • AOrigin code
   • BLocal preference
   • CNext hop
   • DAS number
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   In an AS path regular expression, what does the caret (^) symbol represent?

   • AAny single AS number
   • BZero or more occurrences of the preceding element
   • CThe end of the AS path
   • DThe beginning of the AS path
   Reveal Solution Discussion Select an answer first
6. 10expert · hard

   You have two upstream providers, ISP-A and ISP-B. You want to use ISP-A as the primary for all outbound traffic, but you also want to load balance traffic between the two providers for certain prefixes. You have applied an import policy to ISP-A that sets local preference to 200 for all routes. What should you do to achieve load balancing for specific prefixes?

   • AUse MED to influence load balancing.
   • BSet the 'preference' option on ISP-B's BGP group to 200.
   • CApply an import policy to ISP-B that sets local preference to 200 for the specific prefixes.
   • DApply an export policy to ISP-B that sets local preference to 200 for the specific prefixes.
   Reveal Solution Discussion Select an answer first